Concrete step and the like



Jan; 28, 11930.

c. D. FLOTO 1,745,087

CONCRETE STEP AND THE LIKE Filed June 11, 1928 Z Sheets-Shae- 2 PatentedJan. 28, 1930 UNITED ST CHARLES D. FLOTO, F

CONCRETE STEP Application filed. June 11,

This invention relates to concrete steps, stadium seats and the like,and more particularly to constructions of this character having theirparts pro-formed ready for as sembling when desired.

An object of this invention is to dispense with the forms or moldsusually employed in construction of this kind, by providing parts orsections adapted to be molded at a factory or plant where they can bepre-formed rapid ly and cheaply.

Another object is to provide a concrete construction of the above kindembodying parts so formed that they may be easily and eXpeditiouslyassembled and joined.

Still another object is to provide a construction of the above kindwhich is extremely strong and durable, light in weight, and economicalto manufacture and erect.

A further object is to provide an improved pro-formed unit or sectionfor constructions of the above kind, embodying a riser and a rearwardlyextending tread integral with the upper edge of said riser. A stillfurther object is to provide for assembly of the parts so that thetreads are locked in the stringers and the risers are locked in thetreads to insure against relative displacement of the parts in use.

he invention consists in the novel form, combination and arrangement ofparts hereinafter more fully described, shown in the accompanyingdrawings and claimed.

In the drawings Figure 1 is a fragmentary front elevational View of astadium construction embodying the present invention.

Figure 2 is a vertical section taken substantially on line 2-2 of Figure1.

Figure 8 is an enlarged detail section taken on line 3-3 of Figure 1.

Figure 4 is a perspective view of one of the pro-formed riser and treadunits shown in Figure 1.

Figure 5 is an enlarged fragmentary perspective view of one of thestringers; and

Figure 6 is a view similar to Figure 4 of a riser and tread unit for usein step constructions.

Referring more in detail to the drawings,

STEUBENVILLE, OHIO AND THE LIKE 1928. Serial No. 284,327.

the present invention contemplates the construction of concrete steps,stadiums and the like, and includes stringers 5, each consisting of aconcrete body having metal reinforcing rods 6 embedded therein. Eachstringer is devoid of tread or riser portions and has a straight upperedge in which squared transverse recesses are formed at regularintervals.

The construction further embodies a plu rality of pre-formed concreteunits each comprising a riser 8 and a. rearwardly extending tread 9 atthe upper edge of said riser and in tegral with the latter, said riserand tread having a series of transverse rods 10 and cross rods 11embedded in and reinforcing the same. The tread 9 of each unit isprovided in the upper side of its rear edge portion with a longitudinalgroove 12 to snugly receive the forwardly beveled lower edge 13 of theriser of the next higher unit. Below its grooved portion each tread isprovided with a squared depending rib l l adapted to snugly fit intransversely alined recesses or notches 7 of the stringers 5 at the endsof the units and to reinforce the tread. The riser 8 inclines rearwardlyfrom the tread integral therewith, thereby insuring ample foot room onthe next lower tread and permittinguse of treads of in i r. imuni width.

in assembling the parts, the stringers 5 are arranged in spaced parallelrelation, and the tread and riser units are then assembled andinterlocked. with the stringers and each other as illustrated, asphaltor mortar being employed to unite the units at the joints 12, 13. Inthis way, the ribs it are seated in the recesses 7 and the risers 8 arearranged with their lower edges seated in the grooves 19, of the treads,thus insuring against relative displacement of the parts in use,although permitting the construction to be readily taken apart and setup for use in a new location.

In the construction of steps, the tread of unit will be plain as shownin Figure 6, but in the case of stadium construction the tread of eachunit will be formed with integral upstanding supporting lugs 15 at theends ofits forward portions so that the ends of the seat boards 16 maybe secured thereon.

As shown, nuts 17 are embedded in the lugs 15 in registry with holesopening through the tops of said lugs, so that bolts 18 may be passedthrough the ends of the seat boards 5 and threaded into the nuts to boltthe ends of said seat boards in place and firmly on the flat upper facesof the lugs. The seat boards are thus spaced from the treads except attheir ends so as to readily yield and to permitcirculation of air as isdesirable in construction of this kind. The circulation of air is alsopermitted between the ends of the units and the stringers by making thelatter without riser and tread portions. The stadium sections are placedend to end as shown in Figure l, with the end-joints bet-Ween adj acentunitscaulked with asphalt as at 19.

Minor changes may be made Without departing from the spirit and scope ofthe in- \ention as claimed.

What I claim is 1. In a concrete stadium structure, having integraltread and riser elements, stringers provided with notches for receivingthe tread elements which have correspondingly shaped projectionsengaging said notches, the tread elements having grooves for thereception of tongue elements on the risers the tongues and groovesextending the entire length of said.

89 tread and riser elements.

2. In aconerete stadium structure, having integral tread and riserelements, stringers provided with notches for receiving the treadelements which have correspondingly shaped 36 projections engaging saidnotches, the tread elementshaving grooves for the reception of tongueelements on the risers the tongues and grooves extending the entirelength of said tread and riser elements, the grooves in the t0 meadelementbeing formed at an acute angle for receiving cooperating portionsof the tongue elements.

3. In a concrete stadium structure, having integral tread and riserelements, stringers 6 provided with notches for receiving the treadelements which havecorrespondingly shaped projections engaging saidnotches, the tread elements having grooves for the reception of tongueelements on the risers the tongues and 5D grooves extending the entirelength of said tread and riser elements, the tread elements beingprovided with integral upstanding seat board supporting lugs.

In testimony whereof I aflix my signature.

CHARLES D. FLOTO.

